NASA investigates Typhoon Haiyan's intense rainfall

November 5, 2013 by Rob Gutro
On Nov. 4, NASA's TRMM satellite found precipitation falling at a rate of about 50 and 60 mm/1.9 and 2.3 inches per hour near Typhoon Haiyan's center and between 10 and 30 mm/0.39 and 1.18 inches per hour outside the center. Credit: NASA/SSAI, Hal Pierce

As Typhoon Haiyan has been strengthening, NASA's TRMM satellite investigated how much rain was falling throughout the storm. Typhoon Haiyan is now closing in on Yap and Palau with a forecast to move through the central Philippines, so all of those areas are under warnings and watches.

NASA's Tropical Rainfall Measuring Mission satellite known as TRMM passed over Typhoon Haiyan on Nov. 4 at 1042 UTC/5:42 a.m. EDT. TRMM's Precipitation Radar instrument provided data on in the storm's northeastern quadrant. Rainfall near the center appeared to be falling at a rate of between 50 and 60 mm/1.9 and 2.3 inches per hour. Rainfall outside the center was falling between 10 and 30 mm/0.39 and 1.18 inches per hour. TRMM also saw that some of the thunderstorms were reaching heights over 10 km/6.2 miles high.

On Nov. 5 at 1500 UTC, Haiyan's maximum sustained winds increased to 90 knots/103.6 mph/166.7 kph, and are forecast to increase more over the next several days. Haiyan is centered near 6.9 north and 142.3 east, about 333 nautical miles/ 383.2 miles/616 km east-southeast of Yap. The is moving to the west-northwest at 15 knots/ 17.2 mph/27.7 kph.

A Typhoon Warning is in effect for Kayangel in the Republic of Palau and Ngulu in Yap State, and a Typhoon Watch is in effect for Fais, Ulithi, in Yap State. In addition, a Tropical Storm Warning remains in effect for Yap Island in Yap State and Koror in Palau.

Forecasters at the Joint Typhoon Warning Center or JTWC who provide the bulletins and forecasts on the storm noted on Nov. 5 that animated enhanced infrared satellite imagery showed the Haiyan was intensifying quickly and bands of thunderstorms wrapping into the center were strengthening. There was a strong band of thunderstorms wrapping around the western semi-circle and into an eye detected by microwave satellite data.

JTWC expects the to intensify rapidly over the next two to three days as it moves through the Philippine Sea.

Explore further: NASA's TRMM satellite monitors Typhoon Francisco

Related Stories

NASA's TRMM satellite monitors Typhoon Francisco

October 18, 2013

Typhoon Francisco passed west of Guam on Oct. 18 as NASA and the Japan Space Agency's TRMM satellite passed overhead and measured its heavy rainfall. Francisco is forecast to intensify into a super typhoon.

NASA sees hint of Typhoon Lekima's rapidly intensification

October 22, 2013

Tropical Storm Lekima intensified quickly early on Oct. 22 while traveling over the open waters of the Northwestern Pacific Ocean. The day before the rapid intensification, NASA's TRMM satellite passed overhead and analyzed ...

NASA saw heavy rain in Typhoon Krosa before it hit wind shear

November 4, 2013

NASA's TRMM Satellite observed heavy rainfall occurring in Typhoon Krosa before it ran into strong wind shear. On Nov. 1, Krosa was a Typhoon that was threatening Hainan Island, China and Vietnam. By Nov. 4 after moving through ...

Recommended for you

Can Paris pledges avert severe climate change?

November 26, 2015

More than 190 countries are meeting in Paris next week to create a durable framework for addressing climate change and to implement a process to reduce greenhouse gases over time. A key part of this agreement would be the ...

Amazon deforestation leaps 16 percent in 2015

November 28, 2015

Illegal logging and clearing of Brazil's Amazon rainforest increased 16 percent in the last year, the government said, in a setback to the aim of stopping destruction of the world's greatest forest by 2030.


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.